Designed by Jean-Pierre Vitrac in France between the late 1960s and early 1970s, the Imbroglio perpetual calendar is a refined example of European abstract and conceptual graphic design. The calendar features a painted metal front with a striking black-and-white graphic composition, combined with a magnetic date marker that allows the day to be manually indicated. This simple yet experimental system transforms a functional object into a visual device. The presence of the inscription “Wettig gedeponeerd / IN-LINE®” refers to a legally registered model, commonly associated with the distribution or naming of the graphic system rather than the authorship of the design. Completed with a black-painted wooden frame and a pressed-board back, Imbroglio is both elegant and graphic in character. A rare vintage wall object, suitable for modern interiors and design-led environments. Dimensions: 50 x 50 x 2 cm. Very good vintage condition, with minor signs of age on the structure and frame, consistent with its period. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution